Fireplaces Are Us offer a wide range of balanced flue and powerflue gas fires, which are popular in homes without a chimney. Balanced flue gas fires vent from the back of the fire through an external wall. Powerflue gas fires, also known as power flue gas fires or fan flue gas fires, vent from the back of the fire through an external wall, using an electric powered fan to draw the fumes from the fire. Information about balanced flue and powerflue gas fires is for guidance only, please consult your gas fitter before purchase.﻿﻿